From: here@is.invalid   
      
   On Wed, 24 Aug 2022 02:32:20 +0100, Retrograde   
    wrote:   
      
   >Is it? I thought it measures time based on the decay of radioactive   
   >particles.   
      
   Yes, gravity affects atomics clocks.   
      
   The different rates at which time passes in gravitational fields of   
   different strengths was tested in Chou (2010) by the National   
   Institute of Standards and Technology (NIST) by Boulder, Colorado   
   investigators, as reported in the journal Science. The prediction of   
   general relativity is called gravitational time dilation (and per the   
   link has also been confirmed by other observations).   
      
   https://physics.stackexchange.com/questions/327372/is-an-atomic-   
   lock-itself-affected-by-gravity   
      
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